EP2028829B1 - Nachrichtenverarbeitungsvorrichtung, drahtlose Vorrichtung und Verfahren zum Speichern einer Nachricht in einer drahtlosen Vorrichtung - Google Patents

Nachrichtenverarbeitungsvorrichtung, drahtlose Vorrichtung und Verfahren zum Speichern einer Nachricht in einer drahtlosen Vorrichtung Download PDF

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Publication number
EP2028829B1
EP2028829B1 EP08161652.6A EP08161652A EP2028829B1 EP 2028829 B1 EP2028829 B1 EP 2028829B1 EP 08161652 A EP08161652 A EP 08161652A EP 2028829 B1 EP2028829 B1 EP 2028829B1
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EP
European Patent Office
Prior art keywords
message
wireless device
recited
predetermined
processing apparatus
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EP08161652.6A
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English (en)
French (fr)
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EP2028829A1 (de
Inventor
Brajesh Kumar
Uma Ranjan
Dipu Vikram
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Intel Deutschland GmbH
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Intel Deutschland GmbH
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6209—Protecting access to data via a platform, e.g. using keys or access control rules to a single file or object, e.g. in a secure envelope, encrypted and accessed using a key, or with access control rules appended to the object itself
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0861—Network architectures or network communication protocols for network security for authentication of entities using biometrical features, e.g. fingerprint, retina-scan
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
    • H04L63/105—Multiple levels of security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/7243—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages
    • H04M1/72436—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality with interactive means for internal management of messages for text messaging, e.g. short messaging services [SMS] or e-mails
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/03—Protecting confidentiality, e.g. by encryption
    • H04W12/033—Protecting confidentiality, e.g. by encryption of the user plane, e.g. user's traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/08—Access security
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/12—Messaging; Mailboxes; Announcements
    • H04W4/14—Short messaging services, e.g. short message services [SMS] or unstructured supplementary service data [USSD]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
    • H04M2201/18—Comparators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • Embodiments of the invention relate generally to a message processing apparatus, to a wireless device and to a method of storing a message in a wireless device.
  • methods implemented in a wireless device realize keeping sensitive information secure at all times by necessitating that messages or data containing sensitive information can be viewed only upon presenting some identification credentials without requiring involvement of the sender of the message or the data.
  • This identification may include, but is not restricted to, a previously registered password or a fingerprint data. The identification must be presented each time the message or data is to be accessed.
  • the methods used do not involve any change in the infrastructure from the sender's end, hence they operate seamlessly with the normal messaging system.
  • Wireless devices for example mobile phones or terminals, normally store messages they receive, for example messages according to the short message service (SMS) or messages according to the multimedia message service (MMS), as plain messages just as they were received.
  • SMS short message service
  • MMS multimedia message service
  • Some messages may contain sensitive data, such as details of bank transactions. It is necessary to keep such information secure at all times, even from close friends and family. It is also important to keep such information secure from unauthorized people who may get access to the device through theft or loss of the device.
  • SMS messages carry sensitive data which are preferably to be stored in a secured way. Examples of such data are messages from banks regarding salary credits, cheque transactions, transaction identifier for online transactions etc. If a mobile phone happens to be lost or otherwise accessible to people other than the owner, these messages have the potential to reveal a lot of information about the owner of the phone and subject him to targeted attacks. Hence, it is advantageous to store such information in a manner that only the owner can access it at any time.
  • Some mobile phones enable the locking of the phone by a personal identification number (PIN) or password when the phone is switched off or when there is no activity for a sustained period of time.
  • PIN personal identification number
  • this feature may be rarely used.
  • the phone is stolen while the display is still active, all information is accessible to the unintended recipient.
  • the message in order to prevent displaying a message carrying sensitive information, the message must be accessible only for the period of display of message, and must be protected at all other times.
  • Document US 6,032,053 discloses an improved user interface for a mobile telephone including functions, such as a secret message function and a message screening function.
  • Sensitive information may be protected by encrypting it before sending it over a wireless communication network, in other words, by sending it in an encrypted manner by the sender.
  • this requires the sender also to be aware that his messages are considered confidential by the user.
  • the sender of the message also needs to have the secret key or a public key for each recipient. In other words, this necessitates the establishment of a shared common key between the sender and the recipient.
  • Sensitive information may be protected by encrypting it before sending it over a wireless communication network, in other words, by sending it in an encrypted manner by the sender.
  • the sender of the message also needs to have the secret key or a public key for each recipient. In other words, this necessitates the establishment of a shared common key between the sender and the recipient.
  • a user who needs to send messages to a plurality of recipients, for example a bank sending SMS to their customers, this involves the maintenance of as many keys as accounts, or otherwise to encrypt the message with
  • a method of storing a message in a wireless device comprising receiving a message at a wireless device, filtering the message according to a set of rules including at least one predetermined criterion specified by the user of the wireless device; encrypting the message if the message includes at least the one predetermined criteria and storing the encrypted message in the wireless device.
  • a message processing apparatus comprising a memory to store a set of rules including at least one predetermined criterion specified by the user of the wireless device; a filtering unit to filter a message received by a wireless device according to the set of rules including the at least one predetermined criterion and an encryption unit to encrypt the message if the message includes at least the one predetermined criterion.
  • a wireless device comprising a message processing apparatus as described above in the preceding paragraph.
  • a user of a wireless device for example a mobile phone, is allowed to specify a list of telephone numbers from which he could receive sensitive information.
  • the user may be allowed to store a list of numbers in a "special list".
  • an incoming message for example a SMS or MMS
  • the number is checked against the special list. If it is a part of the list, the message is encrypted using an internally stored secret key. This secret key will be stored in a secure manner so that it can be accessed only by the application doing the actual encryption.
  • the encrypted messages will have a special indication on the display.
  • the user has to enter an identification (such as a password or fingerprint swipe) which is used to derive the password.
  • the message is then decrypted and displayed. The user has to present the identification every time the message is required to be read.
  • messages from certain numbers are stored in an encrypted format using a secret identification such as a password or a biometric identity such as fingerprint.
  • a secret identification such as a password or a biometric identity such as fingerprint.
  • biometric identity such as fingerprint
  • a user of a wireless device can decide which senders or which sender phone numbers or which message patterns he considers confidential and can choose to store such messages in an encrypted form. This does not need the intervention of the sender, although it is possible for a service provider (such as an operator) to specify additional senders to be considered confidential - either through a list in the subscriber identity module (SIM) or through a wireless application protocol (WAP) push action when a new service is registered for by the user.
  • SIM subscriber identity module
  • WAP wireless application protocol
  • a message which has been stored in encrypted format is decrypted when the user presents credentials, such as a password or biometric data, from which the decryption key is derived.
  • a message processing apparatus includes a decryption unit which processes supplied user credentials, such as a password or biometric data, to derive a decryption key or to decrypt a stored encrypted decryption key.
  • Embodiments of the invention can be implemented in hardware or in software or in combined hardware/software.
  • FIG. 1 a block diagram of a part of a wireless device in accordance with an embodiment of the invention is explained further.
  • a radio frequency transceiver for example a radio frequency transceiver, a baseband processor and a power supply, are not shown here.
  • the message parser 101 which is typically part of a GSM/GPRS or UMTS protocol stack, parses an incoming message, which may be a SMS, and passes it on to a filter (filtering unit) 102 to run through a set of rules. These rules include at least one predetermined criteria. They may include an exact match for the number or a set of keywords in the body of the message.
  • the rules are stored in a memory 103 which is coupled to the filter. They may also be stored in a memory within the filter 102 (not shown here).
  • selected messages 104 are identified.
  • messages which include at least the one predetermined criteria are identified as selected messages 104.
  • the information about selected messages is available for access by both the SMS storage unit 105 (which stores a SMS in the wireless device) and the SMS display unit 106 (which displays a SMS to the user).
  • the SMS storage unit 105 receives the messages identified by the filter 102 as requiring secure storage and for such messages, it extracts the message text and passes it to the Secure Message Storage Module 107.
  • the Secure Message Storage Module 107 encrypts the data (message text) received using an internal key which is accessed only by it and returns an encrypted message text to be stored.
  • the internal key (encryption key) is read out from a secure memory 109.
  • the SMS storage unit 105 replaces the original message text with the encrypted text received from the Secure Message Storage Module 107, sets indication bits to indicate that the SMS is now encrypted and stores it in the wireless device.
  • the SMS display unit 106 checks the indication bits corresponding to the stored SMS before displaying the message. For messages which are identified as encrypted, it does not try to display the message, but first gets it decrypted by the Secure Message Storage Module 107. In order to do this, it also obtains a password from the user via a graphical user interface (GUI) 108 (and an input device, not explicitly shown here).
  • GUI graphical user interface
  • the SMS display unit 106 sends the password and the data (message body) to the Secure Message Storage Module 107, which derives the decryption key from the password to decrypt the message body. This decryption key so obtained is capable of decrypting a message encrypted with the encryption key which was previously used for storing the message.
  • FIG. 2 a block diagram of a part of a wireless device in accordance with another embodiment of the invention is explained further.
  • a radio frequency transceiver for example a radio frequency transceiver, a baseband processor and a power supply, are not shown here.
  • FIG. 2 corresponds to a more detailed view of an embodiment of the Secure Message Storage Module 107 of FIG. 1 .
  • This embodiment includes a store/read section 201 which has a store module 202 and a read module 203 corresponding to the store and read functions, respectively.
  • the store module 202 takes data as input. It is provided with the received message 204.
  • An internal cipher key 205 is used to encrypt the received message 204.
  • the read module 203 takes as input both a data and a password. It is provided with the stored message 206 and the password 207.
  • the password 207 is input by the user of the wireless device.
  • An internal key to decrypt the stored message 206 is derived from the password 207 through a key derivation mechanism 208. If the password was correct the stored message 207 can be successfully decrypted using the derived key.
  • the cryptographic functions are provided by a cryptographic module (or cipher module) 209.
  • the cryptographic module may be a symmetric or an asymmetric cipher module. It includes an encryption unit 210 which is coupled to the store module 202. It also includes a decryption unit 211 which is coupled to the read module 203.
  • the internal cipher key 205 is security protected, for example by a hardware access control element, so that the key is accessible only by the store module 202. This enhances the protection of sensitive messages from unauthorized access especially in cases where the integrity of the read module 203 cannot be guaranteed.
  • the identity management module 212 performs the function of registering a secret information representing an identity of an authorized user of the wireless device in the beginning.
  • the identity information is stored in the identity database 213.
  • the identity management module 212 also performs the function of updating the identity when required, for example changing of password or, in case of biometric authentication, changing of user. Updating the identity involves the following actions: verifying the current (old) identity, decrypting the messages with the current (old) identity, re-encrypting the messages with the new identity, storing the new identity information in the identity database.
  • the cipher key 205 in the store module 202 which is derived from the password, is also changed.
  • a password update module (PUM) 214 performs this function. The password change is authorized by checking the old password against the stored key.
  • the administrative module 215 can only be activated by a trusted authority, for example an authorized service center. In a case when the user has forgotten his password, the administrative module 215 permits the registering of a new password without the requirement of the current password. Similar to an update of the identity by the identity management module, the stored password on the wireless device is used to decrypt the stored messages and the messages are re-encrypted with a new password.
  • the software which accesses the stored password for decoding it is a security sensitive piece of code and therefore it is ensured that this code can be executed on a processor of the wireless device only upon a special administrative authorization by a trusted authority.
  • the administrative module performs the following operations: decrypting the messages with the old identity, re-encrypting the messages with the new identity, storing the new identity information in the identity database.
  • a biometric scheme instead of implementing a password-based scheme, a biometric scheme is used.
  • some bits of the SMS message may be modified to indicate that the message is a secure message, for example some of the reserved bits (bits 3 and 4 of "PDU" type in a mobile-terminated SMS (“DELIVER-SMS”)).
  • DELIVER-SMS mobile-terminated SMS
  • the used encryption algorithm may be a chosen standard, such as AES128, or may again be specified through another reserved bit. If the encryption algorithm results in an alteration of the length of the message text in such a manner that the maximum allowed length of the SMS text message is exceeded, a different algorithm may be used for encryption.
  • the secure SMS may be sent as an MMS as an application data, which is of a new content type and format. It may also be made operator-specific if the operator defines a proprietary MMS type.
  • FIG. 3 shows a method of storing a message in a wireless device in accordance with an embodiment of the invention.
  • a message is received at a wireless device.
  • the message may be received through a communication connection associated with a public wireless communication network.
  • the message may be received in an unencrypted format.
  • the received message may be a text message, a Short Message Service (SMS) message or a Multimedia Message Service (MMS) message.
  • SMS Short Message Service
  • MMS Multimedia Message Service
  • the message is filtered according to at least one predetermined criteria.
  • the filtering of the message according to at least one predetermined criteria may include comparing an assigned sender information associated with the message to a predetermined sender information.
  • the assigned sender information may be a phone number.
  • the predetermined sender information may be a list of predetermined phone numbers.
  • the filtering of the message according to at least one predetermined criteria may include comparing a content of the message with a predetermined content.
  • the predetermined content may includes at least one keyword.
  • the message is encrypted if the message includes at least the one predetermined criteria.
  • Encrypting the message may include encrypting the message using a secret key.
  • the secret key may be retrieved from a secure memory associated with the wireless device.
  • the encrypted message is stored in the wireless device.
  • the encrypted message may be retrieved from the wireless device and decrypted, if a correct secret information assigned to the secret key was received.
  • the secret information to be received may be derived from biometric information.
  • the encrypted message may be retrieved from the wireless device and decrypted, if correct user credentials are supplied by a user attempting to read the message.
  • the decryption key may be derived from user credentials, which may be a biometric information.
  • a method of storing a message in a wireless device may include receiving a message at a wireless device, filtering the message according to at least one predetermined criteria, encrypting the message if the message includes at least the one predetermined criteria, and storing the encrypted message in the wireless device.
  • the receiving a message in a wireless device may include receiving the message through a communication connection associated with a public wireless communication network.
  • the received message may be received in an unencrypted format.
  • the received message is a text message, a Short Message Service (SMS) message or a Multimedia Message Service (MMS) message.
  • SMS Short Message Service
  • MMS Multimedia Message Service
  • the filtering of the message according to at least one predetermined criteria may include comparing an assigned sender information associated with the message to a predetermined sender information.
  • the assigned sender information may be a phone number.
  • the predetermined sender information may be a list of predetermined phone numbers.
  • the filtering of the message according to at least one predetermined criteria may include comparing a content of the message with a predetermined content.
  • the predetermined content may include at least one keyword.
  • encrypting the message may include encrypting the message using a secret key.
  • the method may further include retrieving the secret key from a secure memory associated with the wireless device. In yet another example of this embodiment, the method may further include retrieving the encrypted message from the wireless device, receiving a secret information assigned to the secret key, and decrypting the retrieved message. In yet another example of this embodiment, the secret information may be derived from biometric information. In yet another example of this embodiment, the method may further include modifying an indication bit associated with the message.
  • a message processing apparatus may include a memory to store at least one predetermined criteria, a filtering unit to filter a message received by a wireless device according to the at least one predetermined criterion, and an encryption unit to encrypt the message if the message includes at least the one predetermined criteria.
  • the message was received through a communication connection associated with a public wireless communication network.
  • the message was unencrypted when received.
  • the filtering unit may further be configured to compare an assigned sender information associated with the message to a predetermined sender information
  • the memory may further be configured to store the predetermined sender information.
  • the filtering unit may further be configured to compare a content of the message with a predetermined content, and the memory further to store the predetermined content.
  • the encryption unit may further be configured to encrypt the message using a secret key.
  • the message processing apparatus may further include a key retrieving unit to retrieve the secret key from a secure memory associated with the wireless device.
  • the message processing apparatus may further include an input unit to receive a secret information assigned to the secret key.
  • the message processing apparatus may further include a decryption unit to decrypt the encrypted message only if a correct secret information assigned to the secret key has been received.
  • the message processing apparatus may further include an identity management unit to register a secret information representing an identity of an authorized user of the wireless device.
  • the identity management unit may further be configured to assign the secret information to a secret key.
  • the identity management unit may further be configured to change the registered secret information upon receipt of the correct current secret information.
  • the message processing apparatus may further include an administration unit to change the registered secret information upon authorization by a trusted authority.
  • a wireless device may include a message processing apparatus as described above in accordance with any of the described embodiments.

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Claims (16)

  1. Verfahren zum Speichern einer Nachricht in einer drahtlosen Vorrichtung, umfassend:
    Empfangen (301) einer Nachricht (204) an der drahtlosen Vorrichtung;
    Filtern (302) der Nachricht (204) gemäß einem Satz von Regeln, enthaltend mindestens ein im Voraus bestimmtes Kriterium, spezifiziert durch den Benutzer der drahtlosen Vorrichtung;
    gekennzeichnet durch
    Verschlüsseln (303) der Nachricht (204), wenn die Nachricht (204) mindestens das eine im Voraus bestimmte Kriterium enthält; und Speichern (304) der verschlüsselten Nachricht in der drahtlosen Vorrichtung.
  2. Verfahren nach Anspruch 1, wobei Empfangen einer Nachricht (204) in einer drahtlosen Vorrichtung enthält, die Nachricht (204) durch eine mit einem öffentlichen drahtlosen Kommunikationsnetzwerk assoziierte Kommunikationsverbindung zu empfangen.
  3. Verfahren nach Anspruch 1 oder Anspruch 2, wobei die empfangene Nachricht (204) in einem nicht verschlüsselten Format empfangen wird.
  4. Verfahren nach einem der Ansprüche 1 bis 3, wobei die empfangene Nachricht (204) eine Textnachricht, eine Kurznachrichtendienst- bzw. SMS-Nachricht oder eine Multimediennachrichtendienst- bzw. MMS-Nachricht ist.
  5. Verfahren nach einem der Ansprüche 1 bis 4, wobei das Filtern der Nachricht (204) gemäß mindestens einem im Voraus bestimmten Kriterium enthält, eine mit der Nachricht assoziierte zugewiesene Absenderinformation mit einer im Voraus bestimmten Absenderinformation zu vergleichen.
  6. Verfahren nach Anspruch 5, wobei die zugewiesene Absenderinformation eine Telefonnummer ist.
  7. Verfahren nach Anspruch 5 oder Anspruch 6, wobei die im Voraus bestimmte Absenderinformation eine Liste im Voraus bestimmter Telefonnummern ist.
  8. Verfahren nach einem der Ansprüche 1 bis 7, wobei das Filtern der Nachricht (204) gemäß mindestens einem im Voraus bestimmten Kriterium enthält, einen Inhalt der Nachricht (204) mit einem im Voraus bestimmten Inhalt zu vergleichen.
  9. Verfahren nach Anspruch 8, wobei der im Voraus bestimmte Inhalt mindestens ein Schlüsselwort enthält.
  10. Verfahren nach einem der Ansprüche 1 bis 9, wobei Verschlüsseln der Nachricht (204) enthält, die Nachricht mit einem geheimen Schlüssel zu verschlüsseln.
  11. Nachrichtenverarbeitungsvorrichtung, umfassend:
    einen Speicher (103) zum Speichern eines Satzes von Regeln, enthaltend mindestens ein im Voraus bestimmtes Kriterium, spezifiziert durch den Benutzer der drahtlosen Vorrichtung;
    eine Filtereinheit (102) zum Filtern einer durch eine drahtlose Vorrichtung empfangenen Nachricht (204) gemäß dem Satz von Regeln, enthaltend das mindestens eine im Voraus bestimmte Kriterium; und
    gekennzeichnet durch
    eine Verschlüsselungseinheit (107) zum Verschlüsseln der Nachricht, wenn die Nachricht (204) mindestens das eine im Voraus bestimmte Kriterium enthält.
  12. Nachrichtenverarbeitungsvorrichtung nach Anspruch 11, wobei die Nachricht (204) beim Empfang nicht verschlüsselt war.
  13. Nachrichtenverarbeitungsvorrichtung nach Anspruch 11 oder Anspruch 12, wobei die Filtereinheit ferner angepasst ist zum Vergleichen einer mit der Nachricht assoziierten zugewiesenen Absenderinformation mit einer im Voraus bestimmten Absenderinformation und der Speicher ferner angepasst ist zum Speichern der im Voraus bestimmten Absenderinformation.
  14. Nachrichtenverarbeitungsvorrichtung nach einem der Ansprüche 11 bis 13, wobei die Filtereinheit ferner angepasst ist zum Vergleichen eines Inhalts der Nachricht (204) mit einem im Voraus bestimmten Inhalt und der Speicher ferner angepasst ist zum Speichern des im Voraus bestimmten Inhalts.
  15. Nachrichtenverarbeitungsvorrichtung nach einem der Ansprüche 11 bis 14, ferner umfassend eine Identitätsverwaltungseinheit zum Registrieren einer geheimen Information, die eine Identität eines autorisierten Benutzers der drahtlosen Vorrichtung repräsentiert.
  16. Drahtlose Vorrichtung, umfassend eine Nachrichtenverarbeitungsvorrichtung nach Anspruch 11.
EP08161652.6A 2007-08-23 2008-08-01 Nachrichtenverarbeitungsvorrichtung, drahtlose Vorrichtung und Verfahren zum Speichern einer Nachricht in einer drahtlosen Vorrichtung Active EP2028829B1 (de)

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US11/843,724 US9391997B2 (en) 2007-08-23 2007-08-23 Message processing apparatus, wireless device and method of storing a message in a wireless device

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US20160352692A1 (en) 2016-12-01
US9391997B2 (en) 2016-07-12
US9807065B2 (en) 2017-10-31
EP2028829A1 (de) 2009-02-25

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